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156 lines
3.7 KiB
C
156 lines
3.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* numutils.c
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* utility functions for I/O of built-in numeric types.
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*
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* integer: pg_atoi, pg_itoa, pg_ltoa
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/numutils.c,v 1.63 2004/04/01 22:51:31 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <errno.h>
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#include <math.h>
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#include <limits.h>
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#include <ctype.h>
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#include "utils/builtins.h"
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#ifndef INT_MAX
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#define INT_MAX (0x7FFFFFFFL)
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#endif
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#ifndef INT_MIN
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#define INT_MIN (-INT_MAX-1)
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#endif
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#ifndef SHRT_MAX
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#define SHRT_MAX (0x7FFF)
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#endif
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#ifndef SHRT_MIN
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#define SHRT_MIN (-SHRT_MAX-1)
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#endif
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#ifndef SCHAR_MAX
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#define SCHAR_MAX (0x7F)
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#endif
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#ifndef SCHAR_MIN
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#define SCHAR_MIN (-SCHAR_MAX-1)
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#endif
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/*
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* pg_atoi: convert string to integer
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*
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* 'size' is the sizeof() the desired integral result (1, 2, or 4 bytes).
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*
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* allows any number of leading or trailing whitespace characters.
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*
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* 'c' is the character that terminates the input string (after any
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* number of whitespace characters).
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*
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* Unlike plain atoi(), this will throw ereport() upon bad input format or
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* overflow.
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*/
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int32
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pg_atoi(char *s, int size, int c)
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{
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long l;
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char *badp;
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/*
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* Some versions of strtol treat the empty string as an error, but
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* some seem not to. Make an explicit test to be sure we catch it.
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*/
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if (s == NULL)
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elog(ERROR, "NULL pointer");
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if (*s == 0)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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errno = 0;
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l = strtol(s, &badp, 10);
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/* We made no progress parsing the string, so bail out */
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if (s == badp)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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/*
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* Skip any trailing whitespace; if anything but whitespace
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* remains before the terminating character, bail out
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*/
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while (*badp != c && isspace((unsigned char) *badp))
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badp++;
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if (*badp != c)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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switch (size)
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{
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case sizeof(int32):
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if (errno == ERANGE
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#if defined(HAVE_LONG_INT_64)
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/* won't get ERANGE on these with 64-bit longs... */
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|| l < INT_MIN || l > INT_MAX
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#endif
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)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for type integer", s)));
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break;
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case sizeof(int16):
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if (errno == ERANGE || l < SHRT_MIN || l > SHRT_MAX)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for type shortint", s)));
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break;
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case sizeof(int8):
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if (errno == ERANGE || l < SCHAR_MIN || l > SCHAR_MAX)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for 8-bit integer", s)));
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break;
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default:
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elog(ERROR, "unsupported result size: %d", size);
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}
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return (int32) l;
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}
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/*
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* pg_itoa - converts a short int to its string represention
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*
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* Note:
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* previously based on ~ingres/source/gutil/atoi.c
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* now uses vendor's sprintf conversion
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*/
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void
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pg_itoa(int16 i, char *a)
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{
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sprintf(a, "%hd", (short) i);
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}
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/*
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* pg_ltoa - converts a long int to its string represention
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*
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* Note:
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* previously based on ~ingres/source/gutil/atoi.c
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* now uses vendor's sprintf conversion
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*/
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void
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pg_ltoa(int32 l, char *a)
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{
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sprintf(a, "%d", l);
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}
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